Explosive compound



'Nifr nn ATENT OFFICE.

FRANS GUSTAF ABEL PROBERG, or EMPORIUM, PENNSYLVANIA, ASSIGNOR or ONE-HALETO DAVID LUNDY WILDR'IOK, or DOVER, NEW JERSEY.

EXPLOSIVE COMPOUND.

srncrsrcnrxozr forming part of Letters Patent No. 540,141,11ated may 28, less.

- Application filed October 1, 1894. Serial 1T0. 524.651. (No specimens.) I

I 1'0 all whom it may concern: Be it known that I, FRANs GUSTAF ABEL BROBERG, a subject of the Swedish King, but

who have declared myintention of becoming a citizen of theUnited States, residing at Emporium, in the county of Cameron and State of Pennsylvania, have'invented certain new and useful Improvements in Explosive Gompounds; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains .to make and use the same.

- My invention relates to improvements in explosive compounds, and it consists essent ally in the product formed by mixing to.-

gether nitro-rosin, nitro-naphthalenes, sulfur, and an oxidizing agent;

The nitro rosin is prepared by treating ordinary rosin with nitric acid, or with a mix ture of nitric and sulfuric acids. It weak acids are used heat should be applied. Should strong acids be used, the acids should be poured into the vessel containing the rosin only a little at a time to prevent too violent a reaction, and, when nitro-sulfuric acid is used, the charringof the rosin; This product after being thoroughly washed to remove the free acid, is mixed with nitro-naphthalenes, or the rosin and the naphthalene may be mixed together before the nitration and both treated together with the acid in the same vessel. To. this mixture of nitro-rosin and nitro-naphtl alenes I add sulfur, and an oxidizing agent, preferably nitrate of soda,thcn mix the mass up'well, and subject the mixture to sufiicient heat to melt the sulfur and ,the nitro compounds. Thesemi-solid mass is made into the granular form preferably by forcing it through a screen and breaking up @he cooled pencil-like lengths so formed.

soda from the atmosphere, to the deterioraof producing the grains.

may be varied within wide limits, and the 5:.--

desired, increasing instead the percentage of? the nitro-rosin, or vice-versa.

to give good results:

First. N itro-rosin, eight per cent; nitro-x naphthalenes, eight percent; sulfur, fourteenv per cent.; nitrate of soda, seventy per cent.

Second. Nitro-rosin, ten per cent; nitronaphthaleu'es', five per cent; saline-"fifteen per cent. nitrate of soda, seventy per ceuti,

Th'ird. Nitro-rosin, six per cent." nitl'oh naphthalenes; ten per ceuhg -snltnr, tour-teem, per cent; nitrate of soda, seventy per cent..} The nitro-rosi'n and also the nitro u'aphthas lanes will form a sort of shellac-like coatin on the grains or particles of the nitrateo soda, and will thus' to a large degree, prevent. the absorptionof moisture by the nitrate of I have'found the three following mixtures;

tion of the'explosive. v Having thus described my invention, what;

I claim, and desire t9 secure by LettersP'at 'ent of the United States, is-*-- v 1'. As a composition of matter, an explo'sive ie compound consisting of nitro -rosin, itronaphthalenes, sulfur, and an oxidizinga cut;

2. Asa composition of mattenan explosive; compound consisting of nitro-rosin, nitro naphthalenes, sulfur, and nitrate of soda. r

in presence of two witnesses. p

FRAhS GUSTAF ABEL BROBERG.

Witnesses: r v

MICHAEL BRENNAN, J can M. KING.

nitro-naphthalenes may be partly omitted if" 1 1:? In testimony whereof I afiix my signature 

